Wow, are you kidding? You mean there are those on this thread that can not see the difference between:

1. A celebrity endorsement (Chuck Norris saying "I Like Huckabee, vote for him", or Oprah saying "I like Obama, vote for him").

and

2. Rush Limbaugh telling people to vote for someone strictly to draw out and antagonize supporters of the opposite ideology of his. He has not endorsed Hillary for President, nor has he endorsed McCain. He had endorsed childishly voting in primaries of camps of whom he has opposed since he started in broadcasting.

If Oprah had come out and said "It's time for Operation (insert name here)! Go out and vote in the Republican primaries to divide up the vote even further and create a long running campaign that is sure to divide the party!", then that would similar to what Rush is doing.

After the explanations that pride and Aztek have laid out, one would have to be willfull at this point to continue feigning ignorance, or completely and honestly not understand the difference (neither of which I would be happy to fall under).

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"The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom."
Isaac Asimov